Fig. 5: In situ studies on active sites identification. | Nature Communications

Fig. 5: In situ studies on active sites identification.

From: Designing Cu0−Cu+ dual sites for improved C−H bond fracture towards methanol steam reforming

Fig. 5: In situ studies on active sites identification.The alt text for this image may have been generated using AI.

In situ FT-IR spectra of 4.25Cu/Cu(Al)Ox along with the sequential introduction of a, b CH3OH/He (1−15 min) and H2O/He (15−30 min), c HCOOCH3/He (1−15 min) and H2O/He (15−30 min), d HCHO/He (1−15 min) and H2O/He (15−30 min) at 240 °C, e CH3OH/H2O/He from 50 to 270 °C, f HCOOH/He (1−30 min) at 180 °C. Operando XAFS spectra of Cu k-edge at g E-space and h, i R-space for pristine 4.25Cu/Cu(Al)Ox catalyst (reduction in H2, CH3OH pumping, H2O pumping and He purging in turn).

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